H br scaling staging

• scale single-Higgs production processes as a function of CV, kl, kt with the option --PO 'doHscaling=True'
• with 'doHscaling=True' option, also the Higgs processes of background (positive process number) are scaled
• scale Higgs branching ratios as a function of CV, kl, kt with the option --PO 'doBRscaling=True'

For a correct production and decay parsing, the process names must be provided with the following syntax:
<production>_<whatever>_<decay>
For intermediate decays, e.g. H->ZZ->llll, the syntax must be <hdecay1><sub-decays>
Some example:

qqHH_CV_1_C2V_1_kl_0_2016_hbbhgg      
ggHH_kl_1_kt_1_hbbhzz4l     
ttH_hzz4l      
ggH_hww2l2nu      

Code by fmonti .